Trying calling 1 800 4MY XBOX instead of emailing because you may get more satisfaction from an actual agent then zipping off emails back and forth.
The agents who work support do take notes of each individual call issued to them, and it is stored in a data base so that all Xbox agents can pull up your file(s) and view the issues for each time you called. You can explain your loss and recovery of your gamertag, and of your Gold Live Membership, and if it is a billing issue, the agent will connect you to billing. If your Live account was canceled, they should be able to give you a date, and even a reason of why it was canceled. If you are not satisfied with the results, politely ask them to escalate it, and do try to be patient with them on the phone.